Apart from well-known editions such as the normal Ubuntu and Kubuntu, the Ubuntu project includes several other variations as well. One of those is Ubuntu Mobile, which targets Mobile Internet Devices and netbooks. While this release currently uses GNOME Mobile, Canonical's David Mandala has stated that they may look at Qt 4.5, which will be released under the LGPL, as a development environment.

"Okay, that covers the graphical side of things, but what about the rest of the stack? Database access, network communications, HTML rendering, JavaScript processing, and so on"

* we have a database lib based on a berkely one. nothing more, though
* network communication: we have (sockets, ipc)
* html rendering + javascript : webkit uses our graphic framework (with the help of cairo, though)
* and a lot more, like qt or glib/gtk+

the EFL are not only a set of graphic libraries...

I don't want to troll, that will be my last comment, but please, before stating something about the EFL, inform you a bit